The oil transit terminal in Aoshan Island of Zhoushan is currently the largest oil transit facility in China. [Photo/zj.zjol.com]

Yu pointed out that the zone has finished all the 89 experimental tasks given it by the nation and has made 83 system innovation achievements, of which 34 had never been seen elsewhere in China before and 10 have been replicated and promoted elsewhere by the State Council.

The zone is now home to more than 15,500 companies, including 4,562 specializing in the oil and gas business, making it a petroleum hub in China. In addition, seven of the world's top 10 oil and gas giants have set up branches in the zone.

Officials said other achievements made by Zhoushan could be seen in environment, tourism and public safety.

The city has recorded good air quality of 95 percent and above in recent years. It hosted over 63 million tourists last year and has been honored as a safe city by the provincial government for 14 consecutive years.